Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html

Study Counts

Type	Study_count
Total_Studies	2488
interventional	1788
Observational	656
Registry	44

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type	Study_Count
Drug	816
Drug\|placebo	201
Other	137
Biological	131
Device	70
Behavioral	69
Procedure	68
Biological\|placebo	42
Dietary Supplement\|placebo	33
Dietary Supplement	30
Drug\|Other	30
Diagnostic Test	18
Drug\|Procedure	17
Device\|Other	15
Biological\|Drug	10
Biological\|Other	8
Device\|Drug	7
Other\|Procedure	7
Other\|placebo	6
Drug\|Other\|placebo	5
Behavioral\|Drug	4
Device\|Procedure	4
Dietary Supplement\|Drug	4
Dietary Supplement\|Drug\|placebo	4
Behavioral\|Other	3
Behavioral\|Procedure	3
Biological\|Drug\|placebo	3
Biological\|Procedure	3
Combination Product	3
Device\|Drug\|Other	3
Biological\|Drug\|Other	2
Biological\|Drug\|Procedure	2
Combination Product\|Other	2
Diagnostic Test\|Other	2
Drug\|placebo\|Procedure	2
Genetic	2
Behavioral\|Biological	1
Behavioral\|Device	1
Behavioral\|Dietary Supplement\|placebo	1
Behavioral\|Drug\|Genetic\|Procedure	1
Behavioral\|Drug\|Other	1
Biological\|Device\|Drug	1
Biological\|Drug\|Other\|placebo	1
Biological\|Genetic\|Other	1
Biological\|Other\|Procedure	1
Biological\|placebo\|Procedure	1
Combination Product\|Diagnostic Test	1
Combination Product\|Dietary Supplement\|placebo	1
Device\|Drug\|placebo	1
Device\|Drug\|Procedure	1
Device\|placebo	1
Diagnostic Test\|Drug	1
Dietary Supplement\|Other	1
Drug\|Other\|Procedure	1
Drug\|Procedure\|Radiation	1
placebo	1
placebo\|Procedure	1
Procedure\|Radiation	1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country	Study_Count
United States	607
NA	161
France	78
Canada	52
China	52
Spain	40
Switzerland	37
United States\|Puerto Rico	35
United Kingdom	33
United States\|Canada	31
Germany	29
Taiwan	26
Thailand	21
Italy	19
Japan	19
Netherlands	18
Mexico	17
Russian Federation	17
Australia	14
Egypt	14
Korea, Republic of	14
Denmark	13
Israel	13
Sweden	13
Brazil	12
Belgium	11
Kenya	11
India	10
Turkey	10
Bangladesh	9
Finland	7
Greece	7
Norway	7
United States\|Canada\|Puerto Rico	7
Hong Kong	5
South Africa	5
United States\|Tanzania	5
Vietnam	5
Bulgaria	4
Colombia	4
Croatia	4
Ethiopia	4
Iran, Islamic Republic of	4
Nigeria	4
Peru	4
United States\|United Kingdom	4
Austria	3
Poland	3
Singapore	3
Tanzania	3
Australia\|New Zealand	2
Belgium\|France	2
Belgium\|Spain	2
Chile	2
Hungary	2
Indonesia	2
Malaysia	2
Pakistan	2
Panama	2
Rwanda	2
Uganda	2
Ukraine	2
United States\|Australia	2
United States\|Australia\|Canada\|France\|Germany\|New Zealand\|Puerto Rico\|United Kingdom	2
United States\|France	2
United States\|New Zealand\|Puerto Rico	2
Zambia	2
Algeria\|Australia\|Austria\|Belgium\|Bulgaria\|Canada\|Denmark\|Finland\|France\|Germany\|Greece\|Ireland\|Israel\|Italy\|Mexico\|Netherlands\|Norway\|Poland\|Portugal\|Romania\|Russian Federation\|Saudi Arabia\|Spain\|Sweden\|Switzerland\|Turkey\|United Kingdom	1
Argentina\|Brazil\|Canada\|United Kingdom	1
Argentina\|Brazil\|Mexico\|Peru\|Russian Federation\|South Africa\|Thailand	1
Argentina\|United States\|Austria\|Brazil\|Chile\|Germany\|Latvia\|Mexico\|Poland\|Russian Federation\|Ukraine\|United Kingdom	1
Australia\|China\|Denmark\|Finland\|France\|Germany\|Greece\|Hong Kong\|India\|Italy\|Philippines\|Portugal\|Saudi Arabia\|South Africa\|Spain\|Switzerland\|Taiwan\|Turkey\|United Kingdom	1
Australia\|United Kingdom	1
Austria\|Belgium\|Bulgaria\|Canada\|Denmark\|France\|Germany\|Greece\|Hungary\|Ireland\|Italy\|Netherlands\|Poland\|Serbia\|Slovakia\|Spain\|Sweden\|United Kingdom	1
Austria\|Belgium\|Bulgaria\|France\|Germany\|Greece\|Hungary\|Ireland\|Israel\|Italy\|Latvia\|Lithuania\|Netherlands\|Poland\|Romania\|Russian Federation\|South Africa\|Spain\|Ukraine\|United Kingdom	1
Austria\|Belgium\|France\|Germany\|Saudi Arabia\|Spain\|United Kingdom	1
Austria\|Belgium\|France\|Germany\|Spain\|United Kingdom	1
Austria\|France\|Germany\|Italy	1
Austria\|France\|Greece\|Italy\|Poland\|Russian Federation\|United Kingdom	1
Austria\|Germany\|Italy\|Russian Federation\|Spain	1
Belarus\|Russian Federation\|Ukraine	1
Belgium\|Australia\|Bulgaria\|Estonia\|Hungary\|Israel\|Latvia\|Malaysia\|Philippines\|Poland\|Slovakia\|Spain\|Thailand\|United Kingdom	1
Belgium\|Bulgaria\|Chile\|Colombia\|Croatia\|Czechia\|Estonia\|Germany\|Hungary\|Israel\|Latvia\|Malaysia\|Philippines\|Poland\|Slovakia\|Spain\|Thailand	1
Belgium\|Canada	1
Belgium\|Czech Republic\|Lithuania	1
Belgium\|France\|Germany\|Italy\|Romania\|Russian Federation\|Spain\|Switzerland\|United Kingdom	1
Belgium\|France\|Germany\|Portugal\|Spain\|Sweden\|Switzerland\|United Kingdom	1
Belgium\|France\|Germany\|United Kingdom	1
Belgium\|France\|Italy\|Lithuania	1
Belgium\|France\|Monaco	1
Belgium\|Germany\|Israel	1
Belgium\|Mauritius\|Moldova, Republic of	1
Benin	1
Benin\|Canada\|Ghana\|Indonesia\|Vietnam	1
Bosnia and Herzegovina	1
Botswana	1
Botswana\|Kenya\|Malawi\|Mozambique\|South Africa\|Tanzania\|Zimbabwe	1
Botswana\|Tanzania\|Zambia\|Zimbabwe	1
Brazil\|Cambodia\|Cameroon\|Ethiopia\|India\|Tanzania\|Vietnam	1
Brazil\|United States\|Argentina\|Colombia\|Greece\|Israel\|Italy\|United Kingdom	1
Bulgaria\|China\|Hong Kong\|Korea, Republic of\|New Zealand\|Poland\|Taiwan\|United Kingdom	1
Bulgaria\|Germany\|Romania\|Serbia	1
Bulgaria\|United States\|Austria\|Estonia\|Georgia\|Hungary\|Latvia\|Moldova, Republic of\|Romania\|Russian Federation\|Slovakia\|Ukraine	1
Canada\|Czech Republic\|Egypt\|France\|Greece\|Jordan\|Portugal\|Russian Federation\|Spain\|Switzerland\|Turkey\|United Kingdom	1
Canada\|France	1
Canada\|Netherlands	1
Canada\|Russian Federation\|Ukraine	1
Chile\|United States\|Argentina\|Bulgaria\|Croatia\|Estonia\|Germany\|Hungary\|Israel\|Korea, Republic of\|Latvia\|Lithuania\|Moldova, Republic of\|Poland\|Serbia	1
China\|Hong Kong\|Indonesia\|Korea, Republic of\|Malaysia\|Taiwan	1
China\|Hong Kong\|Korea, Republic of\|Taiwan\|Vietnam	1
China\|Korea, Republic of\|Taiwan	1
China\|Korea, Republic of\|Vietnam	1
China\|Pakistan\|Philippines	1
Congo	1
Congo, The Democratic Republic of the	1
Costa Rica	1
Croatia\|Czechia\|Israel\|Latvia\|United States\|Argentina\|Australia\|Austria\|Belarus\|Bosnia and Herzegovina\|Brazil\|Bulgaria\|Canada\|Colombia\|Denmark\|Estonia\|Georgia\|Germany\|Greece\|Hungary\|Lithuania\|Mexico\|Netherlands\|North Macedonia\|Peru\|Poland\|Portugal\|Puerto Rico\|Romania\|Russian Federation\|Serbia\|Slovakia\|South Africa\|Spain\|Turkey\|Ukraine\|United Kingdom	1
Cuba	1
Czech Republic	1
Estonia\|Russian Federation	1
Ethiopia\|Rwanda	1
Fiji	1
France\|Germany\|Netherlands	1
France\|Lithuania\|Spain\|United Kingdom	1
French Guiana	1
Gambia	1
Georgia	1
Georgia\|Greece\|Hungary\|Latvia\|Lithuania\|Poland\|Romania\|Estonia\|United States\|Belarus\|Bulgaria\|Croatia\|Czechia\|Russian Federation\|Slovakia\|Ukraine	1
Germany\|Israel\|Italy	1
Germany\|Netherlands	1
Germany\|Poland	1
Germany\|Switzerland	1
Germany\|United Kingdom	1
Germany\|United States\|Australia\|Canada\|Denmark\|France\|Italy\|Sweden\|Switzerland\|United Kingdom	1
Germany\|United States\|Belgium\|Canada\|France\|Hong Kong\|Italy\|Puerto Rico\|United Kingdom	1
Ghana	1
Guatemala	1
India\|Malawi\|South Africa\|Tanzania\|Uganda\|Zambia\|Zimbabwe	1
Iraq	1
Ireland	1
Italy\|United States\|Austria\|Belgium\|Denmark\|France\|Germany\|Greece\|Israel\|Netherlands\|Spain\|United Kingdom	1
Kazakhstan\|Russian Federation	1
Kenya\|Malawi\|South Africa\|Tanzania\|Uganda\|Zimbabwe	1
Kenya\|Tanzania\|Thailand\|Uganda	1
Kenya\|Uganda	1
Kenya\|Zimbabwe	1
Korea, Republic of\|China\|Taiwan	1
Lao People’s Democratic Republic	1
Latvia\|Austria\|Belgium\|Denmark\|France\|Germany\|Ireland\|Italy\|Netherlands\|Portugal\|Spain\|Switzerland\|United Kingdom	1
Latvia\|United States\|Argentina\|Bulgaria\|Canada\|Chile\|Czechia\|Germany\|Greece\|Hungary\|Lithuania\|Mexico\|Peru\|Romania\|Russian Federation\|Ukraine	1
Lebanon	1
Lithuania\|United States\|Argentina\|Bulgaria\|Estonia\|Germany\|Hungary\|Latvia\|Peru\|Romania\|South Africa	1
Madagascar	1
Malawi	1
Malawi\|South Africa	1
Malaysia\|Philippines\|Thailand\|Vietnam	1
Moldova, Republic of	1
Norway\|Sweden	1
Papua New Guinea	1
Poland\|Russian Federation	1
Romania\|Argentina\|Belgium\|Bulgaria\|Estonia\|France\|Germany\|Greece\|Israel\|Latvia\|Lithuania\|Russian Federation\|South Africa\|Spain	1
Romania\|South Africa	1
Russian Federation\|Sweden	1
Russian Federation\|Ukraine	1
Russian Federation\|United States\|Canada\|Croatia\|Georgia\|Germany\|Poland\|Ukraine	1
Russian Federation\|Uzbekistan	1
Saudi Arabia	1
Sierra Leone	1
South Africa\|Tanzania\|Uganda\|Zambia	1
South Africa\|Uganda\|Zambia	1
South Africa\|United States\|Brazil\|Colombia\|Estonia\|Georgia\|Germany\|Hungary\|Israel\|Latvia\|Mexico\|Moldova, Republic of\|Romania\|Russian Federation\|Serbia\|Slovakia\|Thailand	1
Spain\|Switzerland\|United Kingdom	1
Spain\|United States\|Austria\|Belgium\|Canada\|France\|Germany\|Italy\|Latvia\|Luxembourg\|Poland\|Portugal\|Romania\|Switzerland	1
Sri Lanka	1
Sweden\|Spain\|United States\|Argentina\|Australia\|Canada\|France\|Germany\|Italy\|Korea, Republic of\|Mexico\|Russian Federation\|South Africa	1
Tunisia	1
United States\|American Samoa\|Australia	1
United States\|Argentina\|Australia\|Austria\|Belgium\|Brazil\|Bulgaria\|Canada\|Chile\|Colombia\|Czechia\|Estonia\|Finland\|France\|Germany\|Hungary\|Israel\|Italy\|Japan\|Korea, Republic of\|Latvia\|Lithuania\|Mexico\|New Zealand\|Panama\|Poland\|Russian Federation\|South Africa\|Spain\|Sweden\|Turkey\|Ukraine\|United Kingdom	1
United States\|Argentina\|Australia\|Austria\|Belgium\|Brazil\|Canada\|Chile\|China\|Colombia\|Croatia\|Denmark\|Estonia\|Finland\|France\|Germany\|Greece\|Hungary\|India\|Italy\|Korea, Republic of\|Latvia\|Lithuania\|Mexico\|Panama\|Peru\|Poland\|Portugal\|Romania\|Russian Federation\|Slovakia\|South Africa\|Spain\|Sweden\|Switzerland\|Taiwan\|Turkey\|Ukraine\|United Kingdom	1
United States\|Argentina\|Australia\|Belarus\|Belgium\|Brazil\|Bulgaria\|Canada\|Chile\|Czechia\|Germany\|Greece\|Hungary\|Korea, Republic of\|Mexico\|New Zealand\|Peru\|Poland\|Portugal\|Russian Federation\|Spain	1
United States\|Argentina\|Australia\|Belgium\|Brazil\|Bulgaria\|Chile\|China\|Croatia\|Czechia\|France\|Germany\|Greece\|Hong Kong\|Israel\|Italy\|Korea, Republic of\|Mexico\|Peru\|Philippines\|Poland\|Romania\|Russian Federation\|South Africa\|Spain\|Taiwan\|Turkey\|Ukraine	1
United States\|Argentina\|Australia\|Belgium\|Brazil\|Canada\|Chile\|France\|Greece\|Hungary\|Italy\|Mexico\|Netherlands\|Poland\|Romania\|Russian Federation\|South Africa\|Spain\|Taiwan\|United Kingdom	1
United States\|Argentina\|Australia\|Belgium\|Canada\|France\|Germany\|Italy\|Korea, Republic of\|Mexico\|Netherlands\|Portugal\|Romania\|Russian Federation\|South Africa\|Spain\|Taiwan\|United Kingdom	1
United States\|Argentina\|Australia\|Brazil\|Germany\|Mexico\|New Zealand\|Poland\|Russian Federation\|South Africa\|Spain	1
United States\|Argentina\|Belarus\|Bulgaria\|Chile\|Colombia\|Georgia\|Greece\|Guatemala\|Latvia\|Lithuania\|Mexico\|Panama\|Poland\|Romania\|Russian Federation\|South Africa\|Spain\|Ukraine	1
United States\|Argentina\|Belarus\|Bulgaria\|Croatia\|Estonia\|Georgia\|Hungary\|Latvia\|Lithuania\|Mexico\|Peru\|Poland\|Russian Federation\|Serbia\|Slovakia\|South Africa\|Spain\|Ukraine	1
United States\|Argentina\|Belgium\|Brazil\|Chile\|Colombia\|Italy\|Malaysia\|Mexico\|Portugal\|Russian Federation\|Singapore\|South Africa\|Spain\|United Kingdom\|Venezuela	1
United States\|Argentina\|Brazil\|Bulgaria\|Chile\|Estonia\|Georgia\|Hungary\|Korea, Republic of\|Latvia\|Mexico\|Moldova, Republic of\|Peru\|Romania\|Slovakia\|Taiwan	1
United States\|Argentina\|Brazil\|Bulgaria\|Croatia\|Czechia\|Germany\|Greece\|Hungary\|Israel\|Japan\|Korea, Republic of\|Mexico\|Poland\|Portugal\|Romania\|Russian Federation\|Serbia\|Slovakia\|Taiwan\|Turkey\|Ukraine	1
United States\|Argentina\|Brazil\|Canada\|Chile\|Mexico	1
United States\|Argentina\|Brazil\|Canada\|Czechia\|Germany\|Hungary\|Latvia\|Peru\|Slovakia\|Ukraine	1
United States\|Argentina\|Brazil\|Chile\|Germany\|Mexico\|Peru\|Poland\|Romania\|Russian Federation\|Ukraine	1
United States\|Argentina\|Brazil\|Colombia\|Czechia\|Germany\|Hungary\|Malaysia\|Mexico\|Norway\|Poland\|Portugal\|Romania\|South Africa\|Spain\|Sweden\|United Kingdom	1
United States\|Argentina\|Bulgaria\|Croatia\|Czechia\|France\|Israel\|Korea, Republic of\|Mexico\|Peru\|Philippines\|Poland\|Romania\|Russian Federation\|South Africa\|Spain\|Turkey\|Ukraine	1
United States\|Argentina\|Bulgaria\|Croatia\|Czechia\|Germany\|Israel\|Italy\|Korea, Republic of\|Mexico\|Peru\|Poland\|Romania\|Russian Federation\|Spain\|Taiwan\|Ukraine	1
United States\|Argentina\|Bulgaria\|Croatia\|Czechia\|Hungary\|India\|Israel\|Latvia\|Malaysia\|Mexico\|Netherlands\|Peru\|Romania\|Russian Federation\|South Africa\|Spain\|Taiwan\|Thailand\|Ukraine	1
United States\|Argentina\|Bulgaria\|Czech Republic\|Estonia\|France\|Germany\|Latvia\|Lithuania\|Romania\|Russian Federation\|South Africa\|Ukraine	1
United States\|Argentina\|Canada\|France\|Italy\|Mexico\|Portugal\|Puerto Rico\|Russian Federation\|South Africa\|Spain\|Thailand\|United Kingdom	1
United States\|Argentina\|Chile\|Costa Rica\|Germany\|Mexico\|Netherlands\|South Africa\|Taiwan	1
United States\|Argentina\|Chile\|Georgia\|Latvia\|Lithuania\|Poland\|Romania\|South Africa\|Spain	1
United States\|Argentina\|Georgia\|Russian Federation\|Serbia	1
United States\|Argentina\|Germany\|Korea, Republic of\|Romania\|Spain	1
United States\|Australia\|Belgium\|France\|Israel\|Italy\|Korea, Republic of\|Netherlands\|New Zealand\|Poland\|United Kingdom	1
United States\|Australia\|Belgium\|Germany\|Italy\|New Zealand\|Russian Federation\|United Kingdom	1
United States\|Australia\|Belgium\|Israel\|Netherlands\|Russian Federation\|Spain	1
United States\|Australia\|Bulgaria\|Canada\|Chile\|Denmark\|Finland\|Germany\|Hungary\|Netherlands\|New Zealand\|Panama\|Puerto Rico\|South Africa\|Spain\|Sweden\|Turkey\|Ukraine\|United Kingdom	1
United States\|Australia\|Canada\|France\|Germany\|Italy\|New Zealand\|Puerto Rico\|United Kingdom	1
United States\|Australia\|India\|Italy\|Romania\|Ukraine	1
United States\|Australia\|Korea, Republic of\|Taiwan	1
United States\|Australia\|New Zealand\|United Kingdom	1
United States\|Austria\|Belgium\|Canada\|Chile\|China\|Denmark\|Finland\|France\|Germany\|Greece\|Israel\|Italy\|Malaysia\|Netherlands\|Norway\|Poland\|Portugal\|Saudi Arabia\|Singapore\|Slovakia\|Spain\|Sweden\|Switzerland\|United Kingdom	1
United States\|Austria\|Canada\|Denmark\|France\|Germany\|Ireland\|Italy\|Netherlands\|Spain\|United Kingdom	1
United States\|Austria\|France\|Israel\|Spain\|United Kingdom	1
United States\|Austria\|Ireland	1
United States\|Bahamas\|Brazil\|Puerto Rico	1
United States\|Belarus\|Belgium\|Brazil\|Estonia\|France\|Georgia\|India\|Israel\|Latvia\|Mexico\|Russian Federation\|Serbia\|South Africa\|Turkey\|Ukraine	1
United States\|Belarus\|Belgium\|Canada\|Czechia\|Estonia\|France\|Georgia\|Germany\|Israel\|Latvia\|Lithuania\|Peru\|Spain	1
United States\|Belgium\|Canada\|France\|Germany\|Italy\|Portugal\|Spain\|United Kingdom	1
United States\|Belgium\|Canada\|Germany\|Spain\|Switzerland	1
United States\|Belgium\|Canada\|Romania\|Russian Federation\|South Africa\|Spain	1
United States\|Belgium\|Czechia	1
United States\|Belgium\|Germany\|Ireland\|Poland\|Puerto Rico\|United Kingdom	1
United States\|Belgium\|Germany\|Italy\|Taiwan	1
United States\|Belgium\|Germany\|Puerto Rico\|Spain	1
United States\|Belgium\|Italy\|United Kingdom	1
United States\|Belgium\|Mexico\|South Africa\|Taiwan\|Ukraine	1
United States\|Belgium\|United Kingdom	1
United States\|Brazil	1
United States\|Brazil\|Bulgaria\|Germany\|Mexico\|Poland\|South Africa\|Turkey	1
United States\|Brazil\|Canada	1
United States\|Brazil\|Colombia\|Costa Rica\|Ecuador\|Mexico\|Panama\|Peru\|Puerto Rico	1
United States\|Brazil\|Croatia\|France\|Germany\|Greece\|Guatemala\|Israel\|Italy\|Japan\|Korea, Republic of\|Spain\|Taiwan\|Thailand\|Turkey\|United Kingdom	1
United States\|Brazil\|Hungary\|Lithuania\|Malaysia\|Mexico\|Romania\|Russian Federation\|South Africa\|Spain\|Turkey\|Ukraine	1
United States\|Brazil\|Malawi\|Peru\|South Africa\|Thailand\|Zimbabwe	1
United States\|Brazil\|Mexico\|Puerto Rico\|South Africa	1
United States\|Brazil\|Peru\|Switzerland	1
United States\|Brazil\|Puerto Rico\|South Africa\|Thailand	1
United States\|Brazil\|Puerto Rico\|South Africa\|Thailand\|Uganda	1
United States\|Bulgaria\|China\|Croatia\|Hungary\|Latvia\|Mexico	1
United States\|Bulgaria\|Colombia\|Greece\|Norway\|Poland\|Ukraine\|United Kingdom	1
United States\|Bulgaria\|Croatia\|Estonia\|Georgia\|Hungary\|Latvia\|Romania\|Russian Federation\|Serbia\|South Africa\|Ukraine	1
United States\|Bulgaria\|Croatia\|Greece\|Hungary\|Israel\|Latvia\|Peru\|Poland\|Romania\|South Africa\|Spain\|Turkey\|Ukraine	1
United States\|Bulgaria\|Czechia\|Estonia\|Georgia\|Hungary\|Latvia\|Lithuania\|Romania\|Russian Federation\|Ukraine	1
United States\|Bulgaria\|Czechia\|Estonia\|Georgia\|Hungary\|Latvia\|Moldova, Republic of\|Poland\|Romania\|Russian Federation\|Serbia\|Slovakia\|South Africa\|Ukraine	1
United States\|Bulgaria\|Czechia\|Poland	1
United States\|Bulgaria\|Estonia\|Hungary\|Israel\|Korea, Republic of\|Latvia\|Lithuania\|Romania\|Russian Federation\|Slovakia\|South Africa\|Taiwan\|Ukraine	1
United States\|Bulgaria\|France\|India\|Lebanon\|Poland\|Romania\|Russian Federation	1
United States\|Bulgaria\|Germany\|India	1
United States\|Bulgaria\|Germany\|Lebanon\|Poland\|Russian Federation\|Turkey	1
United States\|Bulgaria\|Hungary\|Ukraine	1
United States\|Bulgaria\|India\|Latvia\|Lithuania\|Romania	1
United States\|Canada\|Dominican Republic\|Japan\|Spain\|Taiwan\|Thailand	1
United States\|Canada\|Finland\|Germany\|Philippines\|Thailand\|United Kingdom	1
United States\|Canada\|Finland\|Germany\|Thailand	1
United States\|Canada\|France\|Germany\|Spain	1
United States\|Canada\|Netherlands\|Puerto Rico	1
United States\|China\|Philippines\|Taiwan	1
United States\|China\|South Africa\|Spain	1
United States\|Colombia\|Czechia\|France\|Israel\|Italy\|Spain\|Taiwan	1
United States\|Colombia\|France\|Israel\|Mexico\|Philippines\|Poland\|Russian Federation\|South Africa\|Spain\|Turkey	1
United States\|Costa Rica\|Panama\|Puerto Rico	1
United States\|Croatia\|Israel\|Latvia\|Russian Federation\|Spain\|Ukraine	1
United States\|Czechia\|Greece\|Hungary\|Poland\|Romania\|Russian Federation\|Spain\|Taiwan\|Turkey	1
United States\|Czechia\|Greece\|Hungary\|Poland\|Romania\|Russian Federation\|Taiwan\|Turkey	1
United States\|Czechia\|United Kingdom	1
United States\|Finland\|Mexico	1
United States\|France\|Germany\|Spain	1
United States\|France\|Korea, Republic of\|Sweden\|Switzerland	1
United States\|France\|United Kingdom	1
United States\|Georgia	1
United States\|Germany\|Poland	1
United States\|Germany\|Poland\|Sweden	1
United States\|Greece\|Hungary\|Mexico\|Poland\|Romania\|Russian Federation\|South Africa\|Turkey\|Ukraine	1
United States\|Guatemala	1
United States\|Guinea\|Liberia\|Sierra Leone	1
United States\|Hungary\|Latvia\|Poland\|Serbia	1
United States\|India	1
United States\|India\|Korea, Republic of\|Romania\|Taiwan	1
United States\|India\|Panama	1
United States\|Israel	1
United States\|Israel\|South Africa	1
United States\|Italy	1
United States\|Italy\|Puerto Rico\|	1
United States\|Kenya\|South Africa\|Thailand	1
United States\|Malawi\|South Africa\|Zambia\|Zimbabwe	1
United States\|Mexico	1
United States\|Peru\|South Africa	1
United States\|Puerto Rico\|South Africa	1
United States\|Slovakia\|Spain\|Taiwan	1
United States\|South Africa\|Taiwan\|Thailand	1
United States\|Taiwan\|Argentina\|Australia\|Belgium\|Canada\|France\|Germany\|Italy\|Mexico\|Peru\|Poland\|Portugal\|Romania\|Russian Federation\|Spain\|Switzerland\|United Kingdom	1
United States\|Ukraine	1
United States\|Zimbabwe	1

Sites per Study

Site_count	Study_Count
1	1027
2	113
3	56
4	45
5	50
6	27
7	26
8	17
9	22
10	12
11	20
12	13
13	11
14	15
15	18
16	13
17	14
18	7
19	12
20	6
21	12
22	12
23	3
24	4
25	6
26	7
27	5
28	8
29	2
30	8
31	5
32	4
33	9
34	8
35	6
36	2
37	4
38	4
39	6
40	7
41	1
42	3
43	6
44	2
45	6
46	6
47	3
48	3
49	5
50	9
51	4
52	5
53	2
54	4
55	1
56	2
57	4
58	1
59	4
60	3
61	2
62	3
66	3
67	2
68	2
69	4
70	1
71	4
72	2
73	1
74	1
75	1
76	4
78	3
80	1
84	4
85	1
89	1
90	1
91	1
92	2
93	2
94	1
96	1
100	1
104	1
105	1
106	1
108	1
115	1
118	1
120	1
123	1
126	1
137	1
178	1
179	1
180	1
181	1
187	1
205	1
211	1
277	1
617	1

Phase

Phase	Study_Count
N/A	555
Phase 3	384
Phase 2	308
Phase 4	273
Phase 1	176
Phase 1/Phase 2	47
Phase 2/Phase 3	37
Early Phase 1	8

Number of Arms

Number_of_Arms	Count_of_Studies
1	305
2	868
3	160
4	83
5	25
6	18
7	4
8	12
10	3
11	2
12	1
13	1
25	1
NA	305

Number of Updates

Count of Versions	Count of Studies
1	233
2	224
3	209
4	210
5	157
6	113
7	80
8	70
9	56
10	53
11	41
12	40
13	41
14	27
15	14
16	23
17	15
18	16
19	17
20	14
21	7
22	8
23	11
24	6
25	8
26	6
27	4
28	2
30	4
31	4
32	6
33	5
34	4
35	3
36	2
37	2
38	1
40	2
41	3
42	3
43	2
44	4
45	2
47	2
48	1
49	2
50	1
51	1
55	3
56	1
62	1
63	1
65	2
68	2
70	1
72	2
73	2
87	1
88	1
93	1
94	1
96	1
114	1
118	1
121	1
125	1
189	1
197	1
203	1
242	1
421	1

Update History Change Type

Change Type	Count_of_Changes	Count_of_Studies	ratio
Study Status	13882	1555	8.927331
Contacts/Locations	6168	1291	4.777692
Recruitment Status	2359	1278	1.845853
None (earliest Version on record)	1788	1788	1.000000
Study Design	1610	1064	1.513158
Outcome Measures	1499	774	1.936692
Arms	1170	696	1.681034
Interventions	1170	696	1.681034
Eligibility	1155	644	1.793478
Study Identification	1126	677	1.663220
Study Description	1063	617	1.722852
Sponsor/Collaborators	1036	674	1.537092
Oversight	738	605	1.219835
Conditions	624	379	1.646438
More Information	606	248	2.443548
References	527	378	1.394180
Results	356	356	1.000000
IPDSharing	255	215	1.186047
Baseline Characteristics	148	125	1.184000
Reported Adverse Events	126	99	1.272727
Documents	117	111	1.054054
Participant Flow	109	92	1.184783
Results Submission Events	105	105	1.000000
2020 Study Status	4	3	1.333333
2020Recruitment Status	2	2	1.000000
2020 Baseline Characteristics	1	1	1.000000
2020 Documents	1	1	1.000000
Quality Control Review has not concludedReturned: April 28	1	1	1.000000
Quality Control Review has not concludedReturned: February 25	1	1	1.000000
Quality Control Review has not concludedReturned: June 4	1	1	1.000000
Quality Control Review has not concludedReturned: March 9	1	1	1.000000
Quality Control Review has not concludedReturned: May 12	1	1	1.000000
Quality Control Review has not concludedReturned: May 13	1	1	1.000000
Quality Control Review has not concludedReturned: May 27	1	1	1.000000
Quality Control Review has not concludedReturned: May 29	1	1	1.000000

Enrollment Metrics by Phase

Measure	Early.Phase.1	N.A	Phase.1	Phase.1.Phase.2	Phase.2	Phase.2.Phase.3	Phase.3	Phase.4
Min.	1.000	1.000	2.0000	8.000	7.0000	2.0000	10.0000	6.0000
1st Qu.	10.000	60.000	20.0000	20.000	47.0000	50.0000	151.2500	72.5000
Median	15.000	221.000	32.0000	56.000	100.0000	154.0000	350.0000	169.0000
Mean	201.375	1566.178	55.6506	2798.267	220.3213	517.9189	758.4603	504.7978
3rd Qu.	78.500	718.000	56.0000	120.000	210.0000	380.0000	711.5000	393.0000
Max.	1306.000	126750.000	500.0000	118621.000	3101.0000	5659.0000	12793.0000	22089.0000

Trial Group Type

group_type	Group_Count
Experimental	1843
Active Comparator	789
Placebo Comparator	356
NA	305
No Intervention	203
Other	108
Sham Comparator	13

Intervention Model

intervention_model	Study_Count
Parallel Assignment	1140
Single Group Assignment	372
NA	164
Crossover Assignment	51
Sequential Assignment	34
Factorial Assignment	27

Primary Purpose

primary_purpose	Study_Count
Treatment	1036
Prevention	492
Diagnostic	57
Basic Science	53
Health Services Research	37
Other	34
Supportive Care	32
NA	30
Screening	15
Device Feasibility	1
Educational/Counseling/Training	1

Observational Studies

Studies by Country

Country	Study_Count
United States	188
France	74
NA	65
China	35
Spain	17
United Kingdom	16
Germany	15
Switzerland	14
Canada	12
Italy	12
Taiwan	12
Denmark	11
Israel	11
Netherlands	9
Thailand	9
Brazil	8
India	7
Austria	6
Egypt	6
Korea, Republic of	6
Japan	5
United States\|Canada	5
Turkey	4
Australia	3
Belgium	3
Congo, The Democratic Republic of the	3
Finland	3
Hong Kong	3
Indonesia	3
Martinique	3
Norway	3
Russian Federation	3
Sweden	3
Tanzania	3
Uganda	3
Argentina	2
Cambodia	2
Mexico	2
Pakistan	2
Philippines	2
Poland	2
Argentina\|Bangladesh\|Brazil\|Canada\|Chile\|China\|Colombia\|India\|Iran, Islamic Republic of\|Kazakhstan\|Kyrgyzstan\|Malaysia\|Pakistan\|Palestinian Territory, occupied\|Peru\|Philippines\|Poland\|Russian Federation\|Saudi Arabia\|South Africa\|Sweden\|Tanzania\|Turkey\|United Arab Emirates\|Zimbabwe	1
Argentina\|Barbados\|Colombia\|Sri Lanka\|Thailand	1
Argentina\|Chile\|Colombia\|Ecuador\|Mexico\|Peru\|Uruguay	1
Austria\|Belgium\|Bulgaria\|Croatia\|Czech Republic\|Denmark\|Estonia\|Finland\|France\|Germany\|Greece\|Hungary\|Ireland\|Italy\|Latvia\|Lithuania\|Netherlands\|Norway\|Poland\|Portugal\|Romania\|Russian Federation\|Serbia\|Slovenia\|Spain\|Sweden\|Switzerland\|Turkey\|Ukraine\|United Kingdom	1
Austria\|Germany	1
Bangladesh	1
Belarus	1
Belgium\|Cambodia\|Congo, The Democratic Republic of the	1
Belgium\|Czechia\|Estonia\|France\|Italy\|Netherlands\|Romania\|Serbia\|Spain\|United Kingdom	1
Belgium\|Netherlands\|United Kingdom	1
Bolivia\|Chile	1
Botswana	1
Brazil\|France\|Greece\|Italy\|Russian Federation\|Spain	1
Burkina Faso	1
CÃ´te D’Ivoire\|Indonesia\|Mali\|Nepal	1
Canada\|Philippines	1
Croatia\|Germany\|Italy	1
Ecuador	1
Finland\|Ireland\|Netherlands\|Portugal\|Switzerland	1
Finland\|Netherlands\|Spain\|United Kingdom	1
France\|Belgium\|Germany\|Greece\|Italy\|Netherlands\|Portugal\|Spain\|Turkey\|United Kingdom	1
France\|Germany\|Italy\|Spain\|United Kingdom	1
France\|Hungary\|Italy\|Poland\|Spain	1
Gambia	1
Germany\|Hungary\|Norway\|United Kingdom	1
Germany\|Italy\|United Kingdom	1
Greece	1
Hungary	1
Iran, Islamic Republic of	1
Ireland	1
Israel\|Netherlands	1
Israel\|United Kingdom	1
Kenya	1
Latvia	1
Lithuania	1
Moldova, Republic of	1
Mozambique	1
Myanmar	1
Peru	1
Portugal	1
Romania	1
Rwanda\|South Africa	1
Sierra Leone	1
Suriname	1
Swaziland	1
Uganda\|United Kingdom	1
United States\|Argentina\|Austria\|Belgium\|Canada\|China\|Denmark\|Germany\|Japan\|Switzerland	1
United States\|Australia\|Brazil\|Canada\|Zimbabwe	1
United States\|Australia\|China\|Colombia	1
United States\|Austria\|Israel\|Switzerland\|United Kingdom	1
United States\|Brazil\|Peru\|South Africa	1
United States\|Canada\|Israel\|Singapore\|United Kingdom	1
United States\|Denmark	1
United States\|Dominican Republic\|Haiti\|Peru\|Puerto Rico\|South Africa	1
United States\|Greece	1
United States\|Greece\|Italy\|United Kingdom	1
United States\|India	1
United States\|Malawi\|South Africa\|Tanzania\|Uganda	1
United States\|Puerto Rico	1
Vietnam	1
Zimbabwe	1

Sites per Study

Site_count	Study_Count
1	483
2	52
3	17
4	12
5	7
6	7
7	6
8	3
9	2
10	4
11	3
12	3
13	2
14	3
15	5
16	2
17	3
18	2
19	1
20	2
21	4
22	2
23	3
24	3
25	2
26	1
27	3
30	2
33	1
34	1
35	1
36	2
38	2
43	2
45	1
52	2
59	2
69	1
163	1
538	1

Number of Updates

Count of Versions	Count of Studies
1	135
2	139
3	108
4	63
5	61
6	24
7	17
8	15
9	14
10	5
11	9
12	7
13	5
14	3
15	3
16	3
17	5
19	4
20	1
22	2
23	2
24	3
25	1
27	1
28	1
29	1
30	1
37	1
38	1
39	1
41	1
42	1
54	1
60	1
62	1
63	1
70	1
74	1
80	1
89	1
94	1
95	1
98	1
100	1
123	1
124	1
126	1
135	1
147	1
151	1

Update History Change Type

Change Type	Count_of_Changes	Count_of_Studies	ratio
Study Status	3999	521	7.675624
Contacts/Locations	1034	387	2.671835
Study Description	765	178	4.297753
None (earliest Version on record)	656	656	1.000000
Recruitment Status	629	393	1.600509
Study Design	605	354	1.709040
Eligibility	374	178	2.101124
Sponsor/Collaborators	272	189	1.439153
Study Identification	238	164	1.451220
Outcome Measures	222	157	1.414013
Conditions	190	134	1.417910
Oversight	155	127	1.220472
References	152	83	1.831325
Groups	139	105	1.323810
Interventions	139	105	1.323810
IPDSharing	35	32	1.093750
Results	33	33	1.000000
More Information	23	18	1.277778
Baseline Characteristics	10	8	1.250000
Documents	5	5	1.000000
Results Submission Events	5	5	1.000000
Reported Adverse Events	4	3	1.333333
Participant Flow	3	2	1.500000

Enrollment Metrics

Measure	Observational
Min	0.00
1st Qu	100.00
Median	250.00
Mean	11672.87
3rd Qu	908.00
Max	1660652.00

Observation Model

observational_model	Study_Count
Cohort	342
Case-Only	101
NA	68
Case-Control	46
Other	43
Case Control	28
Ecologic or Community	12
Natural History	5
Case Control, Natural History	3
Defined Population, Natural History	3
Case-Crossover	2
Family-Based	2
Defined Population	1

Time Perspective

time_perspective	Study_Count
Prospective	443
Retrospective	104
NA	42
Cross-Sectional	39
Other	19
Longitudinal, Prospective	8
Longitudinal, Retrospective	1

Registries

Studies by Country

Country	Study_Count
China	5
France	5
Italy	4
United States	4
Turkey	3
Belgium	2
Canada	2
Colombia	2
Spain	2
Sweden	2
Austria	1
Chile	1
Denmark	1
Denmark\|Norway\|Sweden	1
Ethiopia	1
Germany	1
Hong Kong\|Korea, Republic of\|Singapore\|Taiwan\|Thailand	1
NA	1
Singapore	1
Switzerland	1
Taiwan	1
United States\|Australia\|Belgium\|Germany\|Italy\|New Zealand\|Russian Federation\|United Kingdom	1
United States\|Australia\|Canada\|France\|Germany\|Italy\|New Zealand\|Puerto Rico\|Spain\|United Kingdom	1

Sites per Study

Site_count	Study_Count
1	33
2	2
5	1
6	2
8	1
14	1
16	1
48	1
54	1
138	1

Number of Updates

Count of Versions	Count of Studies
1	6
2	17
3	10
4	3
5	2
6	1
7	1
8	1
13	1
26	1
35	1

Update History Change Type

Change Type	Count_of_Changes	Count_of_Studies	ratio
Study Status	143	38	3.763158
Contacts/Locations	72	28	2.571429
None (earliest Version on record)	44	44	1.000000
Recruitment Status	28	23	1.217391
Study Design	22	17	1.294118
Eligibility	15	12	1.250000
Study Description	13	11	1.181818
Oversight	11	10	1.100000
Study Identification	11	9	1.222222
Sponsor/Collaborators	10	6	1.666667
Conditions	9	6	1.500000
Outcome Measures	7	7	1.000000
Groups	6	6	1.000000
Interventions	6	6	1.000000
References	3	2	1.500000
IPDSharing	2	2	1.000000

Enrollment Metrics

Measure	Registries
Min	1.000
1st Qu	138.750
Median	472.000
Mean	1323.386
3rd Qu	1014.500
Max	15926.000

Registry Model

observational_model	Study_Count
Cohort	27
Case-Control	7
Other	5
Case-Only	4
Case-Crossover	1

Time Perspective

time_perspective	Study_Count
Prospective	40
Cross-Sectional	2
Other	2

Follow-up

target_duration	Study_Count
5 Years	4
6 Months	4
1 Year	3
2 Weeks	3
30 Days	3
1 Day	2
10 Years	2
18 Years	2
2 Years	2
3 Months	2
3 Weeks	2
4 Weeks	2
1 Month	1
12 Months	1
14 Days	1
24 Months	1
28 Days	1
3 Years	1
31 Years	1
4 Months	1
4 Years	1
41 Weeks	1
60 Days	1
7 Months	1
8 Days	1

intervention_type	Study_Count
Drug	816
Drug\|placebo	201
Other	137
Biological	131
Device	70
Behavioral	69
Procedure	68
Biological\|placebo	42
Dietary Supplement\|placebo	33
Dietary Supplement	30
Drug\|Other	30
Diagnostic Test	18
Drug\|Procedure	17
Device\|Other	15
Biological\|Drug	10
Biological\|Other	8
Device\|Drug	7
Other\|Procedure	7
Other\|placebo	6
Drug\|Other\|placebo	5
Behavioral\|Drug	4
Device\|Procedure	4
Dietary Supplement\|Drug	4
Dietary Supplement\|Drug\|placebo	4
Behavioral\|Other	3
Behavioral\|Procedure	3
Biological\|Drug\|placebo	3
Biological\|Procedure	3
Combination Product	3
Device\|Drug\|Other	3
Biological\|Drug\|Other	2
Biological\|Drug\|Procedure	2
Combination Product\|Other	2
Diagnostic Test\|Other	2
Drug\|placebo\|Procedure	2
Genetic	2
Behavioral\|Biological	1
Behavioral\|Device	1
Behavioral\|Dietary Supplement\|placebo	1
Behavioral\|Drug\|Genetic\|Procedure	1
Behavioral\|Drug\|Other	1
Biological\|Device\|Drug	1
Biological\|Drug\|Other\|placebo	1
Biological\|Genetic\|Other	1
Biological\|Other\|Procedure	1
Biological\|placebo\|Procedure	1
Combination Product\|Diagnostic Test	1
Combination Product\|Dietary Supplement\|placebo	1
Device\|Drug\|placebo	1
Device\|Drug\|Procedure	1
Device\|placebo	1
Diagnostic Test\|Drug	1
Dietary Supplement\|Other	1
Drug\|Other\|Procedure	1
Drug\|Procedure\|Radiation	1
placebo	1
placebo\|Procedure	1
Procedure\|Radiation	1

Count of Versions	Count of Studies
1	233
2	224
3	209
4	210
5	157
6	113
7	80
8	70
9	56
10	53
11	41
12	40
13	41
14	27
15	14
16	23
17	15
18	16
19	17
20	14
21	7
22	8
23	11
24	6
25	8
26	6
27	4
28	2
30	4
31	4
32	6
33	5
34	4
35	3
36	2
37	2
38	1
40	2
41	3
42	3
43	2
44	4
45	2
47	2
48	1
49	2
50	1
51	1
55	3
56	1
62	1
63	1
65	2
68	2
70	1
72	2
73	2
87	1
88	1
93	1
94	1
96	1
114	1
118	1
121	1
125	1
189	1
197	1
203	1
242	1
421	1

Site_count	Study_Count
1	483
2	52
3	17
4	12
5	7
6	7
7	6
8	3
9	2
10	4
11	3
12	3
13	2
14	3
15	5
16	2
17	3
18	2
19	1
20	2
21	4
22	2
23	3
24	3
25	2
26	1
27	3
30	2
33	1
34	1
35	1
36	2
38	2
43	2
45	1
52	2
59	2
69	1
163	1
538	1

Count of Versions	Count of Studies
1	135
2	139
3	108
4	63
5	61
6	24
7	17
8	15
9	14
10	5
11	9
12	7
13	5
14	3
15	3
16	3
17	5
19	4
20	1
22	2
23	2
24	3
25	1
27	1
28	1
29	1
30	1
37	1
38	1
39	1
41	1
42	1
54	1
60	1
62	1
63	1
70	1
74	1
80	1
89	1
94	1
95	1
98	1
100	1
123	1
124	1
126	1
135	1
147	1
151	1

Count of Versions	Count of Studies
1	233
2	224
3	209
4	210
5	157
6	113
7	80
8	70
9	56
10	53
11	41
12	40
13	41
14	27
15	14
16	23
17	15
18	16
19	17
20	14
21	7
22	8
23	11
24	6
25	8
26	6
27	4
28	2
30	4
31	4
32	6
33	5
34	4
35	3
36	2
37	2
38	1
40	2
41	3
42	3
43	2
44	4
45	2
47	2
48	1
49	2
50	1
51	1
55	3
56	1
62	1
63	1
65	2
68	2
70	1
72	2
73	2
87	1
88	1
93	1
94	1
96	1
114	1
118	1
121	1
125	1
189	1
197	1
203	1
242	1
421	1

Site_count	Study_Count
1	483
2	52
3	17
4	12
5	7
6	7
7	6
8	3
9	2
10	4
11	3
12	3
13	2
14	3
15	5
16	2
17	3
18	2
19	1
20	2
21	4
22	2
23	3
24	3
25	2
26	1
27	3
30	2
33	1
34	1
35	1
36	2
38	2
43	2
45	1
52	2
59	2
69	1
163	1
538	1

Count of Versions	Count of Studies
1	135
2	139
3	108
4	63
5	61
6	24
7	17
8	15
9	14
10	5
11	9
12	7
13	5
14	3
15	3
16	3
17	5
19	4
20	1
22	2
23	2
24	3
25	1
27	1
28	1
29	1
30	1
37	1
38	1
39	1
41	1
42	1
54	1
60	1
62	1
63	1
70	1
74	1
80	1
89	1
94	1
95	1
98	1
100	1
123	1
124	1
126	1
135	1
147	1
151	1

communicable diseases

Study Counts

Studies over Time

Interventional Trials

Intervention Type

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Studies by Country

Sites per Study

Phase

Number of Arms

Number of Updates

Update History Change Type

Enrollment Metrics by Phase

Trial Group Type

Intervention Model

Primary Purpose

Observational Studies

Studies by Country

Sites per Study

Number of Updates

Update History Change Type

Enrollment Metrics

Observation Model

Time Perspective

Registries

Studies by Country

Sites per Study

Number of Updates

Update History Change Type

Enrollment Metrics

Registry Model

Time Perspective

Follow-up

Count of Versions	Count of Studies
1	233
2	224
3	209
4	210
5	157
6	113
7	80
8	70
9	56
10	53
11	41
12	40
13	41
14	27
15	14
16	23
17	15
18	16
19	17
20	14
21	7
22	8
23	11
24	6
25	8
26	6
27	4
28	2
30	4
31	4
32	6
33	5
34	4
35	3
36	2
37	2
38	1
40	2
41	3
42	3
43	2
44	4
45	2
47	2
48	1
49	2
50	1
51	1
55	3
56	1
62	1
63	1
65	2
68	2
70	1
72	2
73	2
87	1
88	1
93	1
94	1
96	1
114	1
118	1
121	1
125	1
189	1
197	1
203	1
242	1
421	1

Site_count	Study_Count
1	483
2	52
3	17
4	12
5	7
6	7
7	6
8	3
9	2
10	4
11	3
12	3
13	2
14	3
15	5
16	2
17	3
18	2
19	1
20	2
21	4
22	2
23	3
24	3
25	2
26	1
27	3
30	2
33	1
34	1
35	1
36	2
38	2
43	2
45	1
52	2
59	2
69	1
163	1
538	1

Count of Versions	Count of Studies
1	135
2	139
3	108
4	63
5	61
6	24
7	17
8	15
9	14
10	5
11	9
12	7
13	5
14	3
15	3
16	3
17	5
19	4
20	1
22	2
23	2
24	3
25	1
27	1
28	1
29	1
30	1
37	1
38	1
39	1
41	1
42	1
54	1
60	1
62	1
63	1
70	1
74	1
80	1
89	1
94	1
95	1
98	1
100	1
123	1
124	1
126	1
135	1
147	1
151	1